A sombre Ukraine on Thursday marks 75 years since the World War II slaughter of some 34,000 Jews on the outskirts of Kiev, one of the largest massacres of the Holocaust. The carnage by Nazi forces at the Babi Yar ravine has caused years of soul-searching and debate in Ukraine over the participation of local collaborators in the killings and atrocities that followed.

The issue of what to do about the world's 65.3 million displaced people takes center stage at the United Nations General Assembly Monday when leaders from around the globe converge on New York for the first-ever summit on Addressing Large Movements of Refugees and Migrants.

Prime Minister Shinzo Abe sent a ritual offering to a shrine for war dead on Monday, the anniversary of Japan`s World War Two defeat, but did not visit the shrine, which is seen in China and South Korea as a symbol of Tokyo`s wartime militarism.

Obama did not publicly mention the surprise 1941 attack that pulled the US into World War II while on his historic trip to Japan this week, during which he became the first sitting American president to visit Hiroshima.